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Puslapis 1 nuo 118 rezultatus
Combined use of l-alanine tert butyl ester lactate and trimethyl-β-cyclodextrin for the enantiomeric separations of 2-arylpropionic acids nonsteroidal anti-inflammatory drugs.
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In this study, a new CE method, employing a binary system of trimethyl-β-CD (TM-β-CD) and a chiral amino acid ester-based ionic liquid (AAIL), was developed for the chiral separation of seven 2-arylpropionic acid nonsteroidal anti-inflammatory drugs (NSAIDs). In particular, the enantioseparation of
L-Alanine induces changes in metabolic and signal transduction gene expression in a clonal rat pancreatic beta-cell line and protects from pro-inflammatory cytokine-induced apoptosis.
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Acute effects of nutrient stimuli on pancreatic beta-cell function are widely reported; however, the chronic effects of insulinotropic amino acids, such as L-alanine, on pancreatic beta-cell function and integrity are unknown. In the present study, the effects of prolonged exposure (24 h) to the
Inflammatory properties of peptidoglycan are decreased after degradation by human N-acetylmuramyl-L-alanine amidase.
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Human N-acetylmuramyl-L-alanine amidase (EC 3.5.1.28) degrades peptidoglycan, a major component of bacterial cell walls with potent pro-inflammatory cytokine-inducing properties. We postulate that degradation of peptidoglycan by N-acetylmuramyl-L-alanine amidase is important for the inactivation of
Determination of the anti-inflammatory and cytoprotective effects of l-glutamine and l-alanine, or dipeptide, supplementation in rats submitted to resistance exercise.
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We evaluated the effects of chronic oral supplementation with l-glutamine and l-alanine in their free form or as the dipeptide l-alanyl-l-glutamine (DIP) on muscle damage, inflammation and cytoprotection, in rats submitted to progressive resistance exercise (RE). Wistar rats (n 8/group) were
Alanyl-glutamine improves pancreatic β-cell function following ex vivo inflammatory challenge.
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Obesity-associated diabetes and concomitant inflammation may compromise pancreatic β-cell integrity and function. l-glutamine and l-alanine are potent insulin secretagogues, with antioxidant and cytoprotective properties. Herein, we studied whether the dipeptide l-alanyl-l-glutamine (Ala-Gln) could
Dietary sulphur amino acid adequacy influences glutathione synthesis and glutathione-dependent enzymes during the inflammatory response to endotoxin and tumour necrosis factor-alpha in rats.
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1. Glutathione concentrations in liver and lung fall when food intake or sulphur amino acid intake is inadequate. However, concentrations may be restored during inflammation, despite anorexia, provided that prior sulphur amino acid intake is adequate. 2. We studied the mechanisms of these changes by
Characterization and biocompatibility of organogels based on L-alanine for parenteral drug delivery implants.
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The development of simple and efficient drug delivery systems for the sustained release of peptides/proteins and low molecular weight hydrophilic molecules is an ongoing challenge. The purpose of this work was to prepare and characterize novel biodegradable in situ-forming implants obtained via the
Stimulation of Cl(-) secretion by L-alanine oligopeptides in the mammalian large intestine.
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A variety of oligopeptides are probably released within the intestinal tissue under inflammatory conditions or during peptide absorption. To examine whether some of these peptides can affect intestinal transport functions, we determined the effects of L-alanine oligopeptide on short-circuit current
The effect of selected amino acids on gelatin-induced inflammation in adult male mice.
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Several studies have indicated to us that certain amino acids may exhibit antiinflammatory activity. In the present study we attempted to evaluate the inhibitory effect of various amino acids on gelatin-induced abdominal inflammation in mice using peritoneal fluid cytology as the diagnostic tool.
Effects of supplementation with free glutamine and the dipeptide alanyl-glutamine on parameters of muscle damage and inflammation in rats submitted to prolonged exercise.
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In this study, we investigated the effect of the supplementation with the dipeptide L-alanyl-L-glutamine (DIP) and a solution containing L-glutamine and L-alanine on plasma levels markers of muscle damage and levels of pro-inflammatory cytokines and glutamine metabolism in rats submitted to
The stereochemistry of the amino acid side chain influences the inflammatory potential of muramyl dipeptide in experimental meningitis.
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Intrathecal injections of 50 to 100 micro g of (N-acetylmuramyl-L-alanyl-D-isoglutamine) muramyl dipeptide (MDP)/rabbit dose-dependently triggered tumor necrosis factor alpha (TNF-alpha) secretion (12 to 40,000 pg/ml) preceding the influx of leukocytes in the subarachnoid space of rabbits.
Role of bacteria and inducible nitric oxide synthase activity in the systemic inflammatory microvascular response provoked by indomethacin in the rat.
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The role of bacteria and nitric oxide (NO), formed by the inducible isoform of NO synthase (iNOS), in a widespread systemic inflammatory microvascular response that follows indomethacin administration, has been investigated in the rat. Subcutaneous administration of indomethacin (10 mg kg(-1)) daily
Anti-inflammatory activity of diazomethyl ketone and chloromethyl ketone analogs prepared from N-tosyl amino acids.
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A series of diazomethyl ketone and chloromethyl ketone analogs prepared from N-tosyl amino acids was shown to have anti-inflammatory activity in mice at 20 mg/kg and in rats at 10 mg/kg. N-Tosyl-L-alanine and N-tosyl-beta-alanine chloromethyl ketones demonstrated the most potent anti-inflammatory
N-Amino acid linoleoyl conjugates: anti-inflammatory activities.
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Several N-linked amino acid-linoleic acid conjugates were studied for their potential as anti inflammatory agents. The parent molecule, N-linoleoylglycine was tested in an in vivo model, the mouse peritonitis assay where it showed activity in reducing leukocyte migration at doses as low as 0.3mg/kg
Glycine restores the anabolic response to leucine in a mouse model of acute inflammation.
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Amino acids, especially leucine, potently stimulate protein synthesis and reduce protein breakdown in healthy skeletal muscle and as a result have received considerable attention as potential treatments for muscle wasting. However, the normal anabolic response to amino acids is impaired during
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